Hi Abdul,
I was also facing same problem but only difference was instead of <input> tag the error was for <p> tag also I was developing Flex for iPhone.
All I did was just closed all tags with proper end tags.
e.g.
<s:TextInput id="userid_txt" x="3" y="10" width="300" height="33" /> was then written as
<s:TextInput id="userid_txt" x="3" y="10" width="300" height="33">
</s:TextInput>
I hope this will solve your problem.